Homematic command delay and repeated commands

I am using Homematic components and Openhab.
When pushing a switch on an Homematic input the action in Openhab is executed about 0.5 to 1 second later.
And one more problem:
When pushing the switch twice (toggle switch for blinds) the second command is ignored. There must be 2 seconds delay between two identic commands.
How can I overcome these problems?
Many Thanks